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</html>";s:4:"text";s:29371:"are used in lubricants for reducing wear and friction, carbon nanofibers are being incorporated in breaks and nano-based paints are used for thermal resistance and aerodynamic drag reduction. ... One of such products which has been using nano material for improved performance is sunscreen. The paint is still drying before historians of technology will be able to fully answer this question. ... Nanotechnology … Its advocates claim that it’s an effective treatment for all sorts of infections and diseases, ranging from the common cold to cancer. Inert earth mineral used as a thickening, whitening, lubricating, and sunscreen ingredient in cosmetics. Nanoparticulate materials are already common in sunscreens. Particles reaching the dermis can be transported to the lymphatic system by … If you’ve been searching high and low for the best SPF for your skin, you may have come across an article or two about mineral sunscreens. May 4, 2021 . Applications … To date, the current weight of evidence suggests that titanium dioxide and zinc oxide nanoparticles (commonly used sunscreen active ingredients) do not reach viable skin cells; rather, they remain on the surface of the … They work immediately up application, last longer in direct UV light, and are less likely to sting. and . It is easy to use as it has a spray nozzle and the user can simply spray it on. Avobenzone, oxybenzone, octocrylene, ecamsule, homosalate, octisalate, and octinoxate have all been detected systemically after … • Nano is a prefix meaning “one-billionth”, or 10-9. Nanoparticles: Health Effects—Pros and Cons. Of course, make sure you practice common sense with sun over- and under-exposure. Nanoday.com is a community for nanotechnology, popular science, ground-breaking research publishing, art, creative thinking, discussions and pure entertainment. Beyond that, sunscreen is unique compared to many other personal care products because you coat it thickly onto your skin, often multiple times a day. Changes the properties of a material. It protects skin from UVA and UVB radiation and is considered no risk of skin sensitivity. Colloidal silver is a popular alternative therapy. They are not absorbed by the skin (unless in nanoparticle form), and therefore do not cause reactions. Choose the best sunscreen in India from this list of the best sunscreen brands we have curated … It just means more research must be done on the potential short- and long-term health implications of sunscreen absorption. Once swallowed, nanoparticles – from lip sunscreens, for example – can damage the gastrointestinal tract, although there are no studies to suggest consumers swallow enough zinc oxide or titanium dioxide for this to pose a concern. The Cushioning Uses of Coiled Carbon Nanotubes » Advantages and Disadvantages of Nanotechnology. If the sunscreen gets in your eyes, rinse thoroughly with water. What are some pros and cons of using zinc oxide? My goal is to help you make an informed decision as to which sunscreen is best for your skin type! It protects skin from UVA and UVB radiation and is considered no risk of skin sensitivity. Titanium dioxide is more or less ineffective against rays that are long so as a result in regard to the aspect of … Because its gentle, titanium dioxide is a great sunscreen active for sensitive, redness-prone skin.It’s great for use around the eyes, as it is highly unlikely to cause stinging. Some benefits include improved skin penetration and better protection from the sun's ultraviolet rays. This technology is on the verge of many innovative advances, which … Physical, or mineral, sunscreen sits on top of the skin and … The Nanoethics Group is a non-partisan organization that evangelizes the responsible progress of nanotechnology. Good … Nanoscale titanium ... some cons have also been noticed due to which the use of nanotechnology at a larger scale is not being encouraged. The problem is that they are also more easily … Ray Hawk Date: February 22, 2021 There are some concerns that nanoparticle zinc oxide could be absorbed by the skin and enter the body, potentially causing health problems.. Nanoparticle zinc oxide, ZnO, is a form of zinc oxide where the compound is formed into individual particles as small as 20 nanometers in diameter. Due to microscopic size of nanoparticles, it increases the risk of inhalation that can severely damage lungs and could also lead to fatal health issues. In the scientific community, there has been much debate on whether these nanoparticles do more harm or good to people and the environment. Aerosolized cosmetic products can result in exposure to nanomaterials via the respiratory tract. What Is a Gold Nanoparticle? They are used in haircare preparations, such as in treatment for hair loss, and can make fragrances last longer. The light of the sun helps release dopamine and increases serotonin … In … Sunscreens have been the subject of debate due to their function as skin cancer shield. Posted by Tiege Hanley in Men's Skin Care Blog & Tips Apr 14, … Health & Safety. With SPF 30 the sun protection is optimum. It’s likely the moisturiser, foundation or eyeliner that you are currently using contains nanoparticles. The Pros of Wearing Sunscreen 1. The gel is light, spreads well and it is absorbed easily and quickly. The effect of nanoparticles on the body is difficult to predict and not easily understood and the long-terms effects on our health and well-being are quite unknown. In the new study, scientists exposed urchin embryos to different levels of nanoparticles used in some sunscreen and boat paint. Pros: full protection from UVA and UVB rays; effective immediately; will not clog pores They are not absorbed by the skin (unless in nanoparticle form), and therefore do not cause reactions. However, because nanoparticles of TiO2 and ZnO are used in formulations, there are precautions against possible respiratory health risks. If this bothers you, don’t use sunscreens with micronized zinc oxide on your lips. ... May contain nanoparticles. The field of nanotechnology relates to the study and micromanipulation of nanostructure properties at dimensions between 1 and 100 nanometers.. Nano-science has a multitude of applications, including technology, manufacturing and medicine. What is Nanotechnology? The nanoparticles contain both insulin and an enzyme that dissolve in high levels of glucose. Both Zinc Oxide and Titanium Dioxide are safe and very stable in formula and when exposed to the sun. Discussion Comments . If you’ve been searching high and low for the best SPF for your skin, you may have come across an article or two about mineral sunscreens. It's as easy as that. Nanotechnologies allow enhanced properties in many areas of interest to the cosmetics industry, including UV protection, deeper skin penetration, and improved hydration. May 4, 2021 . The main disadvantage to Zinc Sunscreens is that you generally have to use more of it to get to a Sun Protection Factor (SPF) of 30, than you would with other sport sunscreens. Nanotechnology also allows the “packaging” of many ingredients in semi-soluble packets that breakdown as the product is being applied, not before. 397–99. This paradoxically increases the risk of skin cancer. The sun is a necessary part of life and does a lot for us. This review mainly seeks the pros and cons of the use of nanomaterials in cosmetics along with some examples of nanomaterials that are widely used in cosmetic industries along with different types of nanotechnology-based cosmetic products. Because the nanoparticles in mineral sunscreens should not be inhaled, it is best to avoid spray and powder formulations to minimize lung exposure. Mineral sunscreens contain the active ingredients titanium dioxide and zinc dioxide or a combination of the two. Pros: full protection from UVA and UVB rays; effective immediately; will not clog pores Many contain harmful chemicals, and even mineral-based ones often contain nanoparticles, minute ingredients that can cross the blood-brain barrier and also harm aquatic life. Further research is being conducted on the safety and efficacy of this but if the FDA has concern it should be avoided. Apply mineral sunscreen in small sections and really rub it in—this helps the product last longer on your skin and minimizes whitening, says Blum. 2. In this podcast, Kira and Bill Van Ittersum cover fears of some of the chemicals in sunscreen, such as, retinyl palmitate and oxybenzone, as well as nanoparticles of ground zinc oxide and titanium dioxide used as mineral blocking agents in sunscreens. The scientists describe development of a new material consisting of nanoparticles of silica (the main ingredient in beach sand) - each 1/50,000th the width of a human hair - coated with copper. They are not ideal for use in water-based and spray-based sunscreen products because of potential for inhalation. Pampers Parents pros and cons: Pros: It’s from a trustworthy brand. Cons: Some Pampers Parents said they wished it came in a higher SPF. Titanium dioxide (CI 77891) lends pigment in paints, cosmetics, sunscreens, toothpaste, pharmaceuticals, paper, and food. “Nanotechnology involves the understanding, manipulation, and control of matter at dimensions of roughly 1 to 100 nanometers (nano.gov). In Vivo Human Skin Penetration Study of Sunscreens by Confocal Raman Spectroscopy, AAPS … who explains some differences in The difference between physical and chemical sunscreen . This is in contrast with the European Union (EU), which only allows titanium dioxide nanoparticles in the belief that the safety of zinc oxide nanoparticles has not been “sufficiently demonstrated”. When applying sunscreen to the face, be careful to avoid contact with the eyes. WELCOME 2. Additionally, nano-phosphate lithium ions batteries (Nanophosphate® from A123 … The product is fairly non-toxic and safe to use on your baby’s skin. Sunscreens: nanoparticles are commonly added to enhance skin penetration. 12) Inflammation and Allergies. Mineral sunscreens contain the active ingredients titanium dioxide and zinc dioxide or a combination of the two. What Are the Pros and Cons of Nanoparticles in Sunscreen? such as: fuel additives to moderate emissions, sunscreen and cosmetics to look after our skin, and antibacterial agents in clothing. Also known as natural … In the scientific community, there has been much debate on whether these nanoparticles do more harm or good to people and the environment. Chemical sunscreen ingredients have been found to be systemically absorbed. Dry skin rescue. ... Nanoparticles – the pros and cons. Nano came from the Greek word “dwarf” means ‘billionth’ . Nanoparticles can have the same dimensions as some biological molecules and can interact with these. One cell study verified the ability of zeolite to bind histamine and thus relieve inflammation and allergic reactions [ 81 ]. Myths and realities of nano futures by Jo Twist. In humans and in other living organisms, they may move inside the body, reach the blood and organs such as the liver or the heart, and may also cross cell membranes. That’s … Many sunscreen lotions are unstable, toxic, and only moderately effective against UVA rays. Therefore, in this ingredient's case, it is good news that it … The increased surface area of the zinc oxide and titanium dioxide nanoparticles reflect more UV-rays than normal sunscreen, preventing the over-exposure of the skin from the suns harmful rays. This is the main reason for the extensive use of zinc oxide and titanium dioxide … • PROS: Quick and easy to apply, natural hydrating lotion base • CONS: Due to absorption into the skin and bloodstream, these are considered less safe • ACTIVE INGREDIENTS: Avobenzone, homosalate, octisalate and others . Always go for non-nano zinc oxide and titanium dioxide. But don’t! The concept of … Maureen R. Gwinn; and ; Val Vallyathan; Maureen R. Gwinn. By K.SURYA SAGAR Asst.Prof. The Food and Drug Administration is proposing additional tests for sunscreens in powder or aerosol form to ensure no nanoparticles or small particles are released that … Previous Article. There have been concerns over the safety of organic chemicals used in chemical sunscreens. Zero waste means that ideally, you … There are two types of active ingredient: chemical absorbers and physical blockers. Unlike chemical sunscreen, physical sunscreen contains active mineral ingredients such as titanium dioxide or zinc oxide. Nanoparticles free; Paraben-free; Gluten-free; Vegan-friendly; Fragrance-free; Cons. To date, the current weight of evidence suggests that titanium dioxide and zinc oxide nanoparticles (commonly used sunscreen active ingredients) do not reach viable skin cells; rather, they remain on the surface of the … Available via license: Public Domain Mark 1.0. It's no really a nanoparticle, per sec, because … These ingredients are split into 2 types: Physical, also sometimes called inorganic or mineral sunscreens, and chemical, also called organic sunscreens. The potential for titanium dioxide and zinc oxide nanoparticles in sunscreens to cause adverse effects depends primarily upon the ability of the nanoparticles to reach viable skin cells. This can make zinc oxide sunscreens more expensive initially, however, you don't need to reapply as often, so they can be effectively cheaper. Sensitive skin is less irritated, and physical sunscreens are more moisturizing according to David Harvey, M.D. Zinc oxide is considered the safest protector from UV rays, but there are justified concerns that in the form of nanoparticles, and in contact with heat, it promotes the production of free radicals. To get a better understanding about the issue, it's important to weigh both the pros and cons of nanoparticles in sunscreen. Pros and Cons of Mineral Sunscreens. In the new study, scientists exposed urchin embryos to different levels of nanoparticles used in some sunscreen and boat paint. They work immediately up application, last longer in direct UV light, and are less likely to sting. Reviews the pros and cons of nanotechnology. Whichever sunscreen you choose, it’s worth reading the label to check the ingredients. 1999). What exactly is titanium dioxide, and why is it used in cosmetics? It is going to affect several aspects of … That metal has well-established antibacterial and anti-odour properties, and the nanoparticles gave copper a … What Are Magnetic Nanoparticles? The paint is still drying before historians of technology will be able to fully answer this question. The summer sun is sizzling above and thoughts turn to spending fun times outside enjoying the warmth and taking in rays. Popular Science, November 1960, p.114. Pros: full protection from UVA and UVB rays; effective immediately; will not clog pores In this post, I’ll explain the main differences between physical and chemical sunscreen as well as the pros and cons of each. Although titanium dioxide is a natural ingredient, titanium dioxide risks being tainted with potentially harmful contaminants such as lead and iron. A nanometer(nm)is a billionth of a meter. and . In mice, a mixture of natural zeolites trapped histamine and other triggers of inflammation, decreasing skin swelling by 57% [ 80 ]. Although spraying on a sunscreen can be convenient and allows for easy application there is large concern for these sprays causing harm as they contain nanoparticles that can be inhaled into the lungs. … This is the main reason for the extensive use of zinc oxide and titanium dioxide nanoparticles … The potential for nanoparticles (NPs) in these areas is infinite, with novel new applications constantly being explored. Because of this, the nanoparticles of ZnO and TiO2 were used in sunscreen (<100 nm) to replace the disadvantage of the microsized particles (Threes, Stanislav, 2011, p. #2). Surprisingly, not all sunscreen ingredients protect against both UVA and UVB rays. In addition, it also increases their refractive index, resulting in a “stronger” sunscreen. The benefits of nanomaterials in cosmetic formulations are huge. Physical Sunscreen. @pastanaga - I think that's how they made that substance out of carbon called graphene. Particles reaching the dermis can be transported to the lymphatic system by … ... microparticles in a sunscreen formulation into the horny layer. Cons: Frequent application required; Thicker texture that is not easy to spread; Tends to make your face look shiny/ or leaves a white cast; Note: It may be tempting to get a physical sunscreen in spray or powder form for easier application. Researchers in nano-technological fields observe and manipulate anatomic properties of various materials up to 1 nanometer in size. Previous Article. In this post, I’ll explain the main differences between physical and chemical sunscreen as well as the pros and cons of each. What are the risks and benefits of using nanoparticles like zinc oxide and titanium dioxide in sunscreens? Characterisation techniques … • BT11.04: Debate pros and cons of animal research and animal rights. Because the nanoparticles in mineral sunscreens should not be inhaled, it is best to avoid spray and powder formulations to minimize lung exposure. Aveeno Baby sunscreen is one you can count on. Nanoparticles are nothing new, though their increased use and ap Nanoparticles: Health Effects—Pros and Cons. Nanoparticulate materials are already common in sunscreens. By K.SURYA SAGAR Asst.Prof. Physical sunscreens, also known as mineral or natural sunscreens, comprise active mineral ingredients like titanium dioxide and zinc oxide that create a physical barrier to reflect sun rays from the skin. While nanotechnology is seen as the way of the future and is a technology that a lot of people think will bring a lot of benefit for all who will be using it, nothing is ever perfect and there will always be pros and cons to everything. 1 Melatonin helps regulate the circadian rhythm, and serotonin boosts mood and promotes calmness and focus. Nanoparticles in sun creams can be absorbed deeper into the skin. Nanotechnology is the science of manipulating atoms and molecules in the nanoscale - 80,000 times smaller than the width of a human hair. Once swallowed, nanoparticles – from lip sunscreens, for example – can damage the gastrointestinal tract, although there are no studies to suggest consumers swallow enough zinc oxide or titanium dioxide for this to pose a concern. Chemical sunscreen soaks into the skin where it absorbs UVA and UVB rays. Next Article. … Also, zinc generally shows up white on skin instead of clear, and the more you … 45, no. Doesn’t leave residue on your baby’s skin; Less is needed to protect your baby’s skin; Spreads easily onto your baby’s skin; Cons Of Chemical … What Are the Pros and Cons of Nanoparticles in Sunscreen? Nanoparticles: Health Effects—Pros and Cons. Nanoparticles of titanium dioxide or zinc oxide are incorporated into textiles to protect your garments – and your skin – from sun damage. The advantages and disadvantages of nanotechnology can be easily enumerated, and here are some of them: The Pros & Cons of Sunscreen. The problem is that they are also more easily absorbed … 4. The Recommendations section at the bottom has information on which … Nanocosmecueticals provide controlled release of active substances. Although spraying on a sunscreen can be convenient and allows for easy application there is large concern for these sprays causing harm as they contain nanoparticles that can be inhaled into the lungs. Now sunscreens use different ingredients to block UV light. It’s unlikely that nanoparticles in sunscreen cause skin damage when energized by sunlight. Titanium dioxide, and to a lesser extent, zinc oxide, are photocatalysts – when they’re exposed to UV radiation, they can form free radicals that damage surrounding cells. Use cautiously or avoid use on irritated skin. Sunscreens block harmful ultraviolet light from the sun reaching the skin. Nanoparticles can offer better UV protection, deeper skin penetration, long-lasting effects, increased colour and finish quality. Address correspondence to V. Vallyathan, NIOSH, Centers for Disease Control and Prevention, 1095 Willowdale Rd., Morgantown, WV 26505 USA. The transparent particles, which effectively filter out ultraviolet-a (UVA) and … ... One of such products which has been using nano material for improved performance is sunscreen. Posted by Tiege Hanley in Men's Skin Care Blog & … I'm happy to see that Pure Anada is on the list. What Are the Different Types of Nanomaterials? This sunscreen’s several benefits have guaranteed its place among the best natural sunscreens. of CHEMISTRY GDC NIRMAL 3. They can also be ingested by marine life making them not reef-safe. The possible toxic health effects of these NPs associated with human exposure are unknown. Skin cancer is the most common form of cancer in the United States caused by exposure to ultraviolet light. Here are my top 3 pros and top 3 cons of mineral makeup. This review mainly seeks the pros and cons of the use of nanomaterials in cosmetics along with some examples of nanomaterials that are widely used in cosmetic industries along with different types of nanotechnology-based cosmetic products. Dry skin rescue. This is in contrast with the European Union (EU), which only allows titanium dioxide nanoparticles in the belief that the safety of zinc oxide nanoparticles has not been “sufficiently demonstrated”. Beyond that, sunscreen is unique compared to many other personal care products because you coat it thickly onto your skin, often multiple times a day. Nanoscale titanium dioxide and zinc oxide are two such materials used in ... more benefits will come to light. Search for more papers by this author . Zinc oxide, however, does. Skin cancer is the most common form of cancer in the United States caused by exposure to ultraviolet light. A sunscreen with the right SPF is a must-have in your handbag, whether or not you spend a lot of time outdoors. Therefore, should it not be the duty of … Inert earth mineral used as a thickening, whitening, lubricating, and sunscreen ingredient in cosmetics. Some worry they could damage stomach lining if swallowed. Inert earth mineral used as a thickening, whitening, lubricating, and sunscreen ingredient in cosmetics. and . These zinc oxide and titanium dioxide particles but fall into much smaller range can perform physically and chemically different to the large particles of that same material. Pros Of Chemical Sunscreen . 4. Maureen R. Gwinn; and ; Val Vallyathan; Maureen R. Gwinn. Many sunscreen lotions are unstable, toxic, and only moderately effective against UVA rays. of CHEMISTRY GDC NIRMAL 3. How to build an automobile smaller than this dot by Richard Feynman. 45, no. BT12.00: Analyze current issues in biomedical technology. Sensitive skin is less irritated, and physical sunscreens are more moisturizing according to David Harvey, M.D. They have not been found to be systemically absorbed even when used as nanoparticles. However, man has unwittingly been using nanoparticles for centuries, for instance as pigments in stained glass and during the vulcanisation of rubber. @pastanaga - I think that's how they made that substance out of carbon called graphene. Although titanium dioxide is a natural ingredient, titanium dioxide risks being tainted with potentially harmful contaminants such as lead and iron. Oxybenzone and avobenzone are 2 common active ingredients of chemical sunscreens. Insoluble nanoparticles are a greater health concern … Beauty by Earth’s Facial Sunscreen SPF 20 (in my opinion) sits at a high-level within the sunscreen market. The third step is to talk about sunscreen ingredients. Nanotechnology Advantages and Disadvantages 1. It increases the risk of damaging the lungs if nanoparticles are inhaled for 60 seconds. Furthermore, every nanoparticle is unique, and sometimes the effects or two of the same nanoparticles are not … Further research is being conducted on the safety and efficacy of this but if the FDA has concern it should be avoided. Nanotechnologies allow enhanced properties in many areas of interest to the cosmetics industry, including UV protection, deeper skin penetration, and improved hydration. As explained in the Scientific American article “Nano-risks: A Big Need for a Little Testing”, Elements at these microscopic levels can exhibit different properties than they do normally. Health & Safety. Many factors should be considered when evaluating the potential risks associated with an engineered nanomaterial: the likelihood of being exposed to Now, it’s important to note that there is no perfect sunscreen. Because the nanoparticles in mineral sunscreens should not be inhaled, it is best to avoid spray and powder formulations to minimize lung exposure. ConsZinc oxide and Titanium dioxide nanoparticles can harm living cells and organs when administered in large doses.Nanoparticles … These nanoparticles are more easily absorbed into your skin and don’t appear as white when applied. There have been concerns over the safety of organic chemicals used in chemical sunscreens. ... How can … For further information on sunscreen toxicity, sunscreen ingredients to avoid, and other concerns about sunscreen lotions, expand the respective sections below. What is Nanotechnology? Through UV-B radiation, sunlight helps the body manufacture vitamin … My goal is to help you make an informed decision as to which sunscreen is best for your skin type! Aerosolized cosmetic products can result in exposure to nanomaterials via the respiratory tract. Pros. Packaging: The sign of a zero waste sunscreen is the packaging it’s contained. Sunscreen can prevent dark spots, fine lines, and other types of skin damages due to the harsh sunrays. Nanoparticles and other nanostructured materials have unique properties which cannot be achieved when working with the bulk form of the material. Nanocosmecueticals provide controlled release of active substances. It is an all-natural sunscreen that contains no chemicals or artificial additives. Doctors and dermatologists highly recommend the use of sunscreen daily in order to prevent a variety of health problems, namely skin cancers and melanoma. Therefore, it allows increased drug penetration into the skin, improved hydration through their … By proactively opening a dialogue about the possible misuses … The Pros and Cons of Mineral Sunscreens "Physical or mineral sunscreen filters, more correctly known as inorganic sunscreen ingredients, are zinc oxide and titanium dioxide," says Koestline. Some benefits include improved skin penetration and better protection from the sun's ultraviolet rays. Introduction Nanomaterials are the particles (crystalline or amorphous) of Organic or Inorganic materials having sizes in the range of 1-100 nm. Apart from lung damage, some other side effects of nanoparticles have also been … It is going to affect several aspects of … Moreover, sunscreen is not a substitute for sun-smart behaviour and should be used in conjunction with proper sun protection, including a hat, t-shirt and adequate shade. There are many types of engineered nanomaterials, and not all are alike or potential hazards. Sunscreens have been the subject of debate due to their function as skin cancer shield. Zinc oxide blocks ultraviolet light, so it is used in sunscreens. Nanoparticles can offer better UV protection, deeper skin penetration, long-lasting effects, increased colour and finish quality. This paradoxically increases the risk of skin cancer. Physical Sunscreen. Zinc oxide blocks ultraviolet light, so it is used in sunscreens. In Vivo Human Skin Penetration Study of Sunscreens by Confocal Raman Spectroscopy, AAPS … ... McSweeney, Penelope C. “The Safety of Nanoparticles in Sunscreens: An Update for General Practice.” Australian Family Physician, vol. Pros and Cons of Physical Sunscreens. Next Article. Physical sunscreens, also known as mineral or natural sunscreens, comprise active mineral ingredients like titanium dioxide and zinc oxide that create a physical barrier to reflect sun rays from the skin. In reality, particle size varies by manufacturer, and some … Pro: It protects against both UVA and UVB rays. Sunscreen comes in 2 flavors: chemical and physical. In lab test these nanoparticles were able to control blood sugar levels for several days. In this podcast, Kira and Bill Van Ittersum cover fears of some of the chemicals in sunscreen, such as, retinyl palmitate and oxybenzone, as well as nanoparticles of ground zinc oxide … Given the minute sizes of these nanomaterials, it … Search for more papers by this author . The Food and Drug Administration is proposing additional tests for sunscreens in powder or aerosol form to ensure no nanoparticles or small particles are released … they provide better skin coverage and more effective protection from the sun’s ultraviolet rays. Nanotechnology is the science of manipulating atoms and molecules in the nanoscale - 80,000 times smaller than the width of a human hair. ";s:7:"keyword";s:40:"nanoparticles in sunscreen pros and cons";s:5:"links";s:1590:"<a href="https://api.duassis.com/storage/ar4q290l/bear-hill-stoneham-sledding">Bear Hill Stoneham Sledding</a>,
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